Constructive Arrangement Introduced in a Reciprocating Compressor Including a Lubricant Oil Pump

Abstract

A reciprocating compressor and, particularly, constructive details of lubricating oil pumps of reciprocating compressors. A constructive arrangement introduced on reciprocating compressor including helical pump of lubricating oil where the rotating shaft includes at least one lower region and at least one intermediate region. On the lower region of the rotating shaft, the lubricating oil is pumped by an internal channel of the rotating shaft and on the intermediate region of the rotating shaft, the lubricating oil is temporary stored and transferred, for the rotating shaft bearing region. The cooperating region between the retaining pin and the rotating shaft is limited by the lower region. The lower region of the rotating shaft includes, on its external side, a contouring recess. These two features prevent the cooperating region of the lower channel of the lubricant oil conduction suffering deformation by assembling the rotating shaft on the electrical engine rotor.

1 . Constructive arrangement introduced in reciprocating compressor including helical pump of lubricant oil, said compressor comprising:
 at least one electrical engine formed by at least one rotor and at least one stator;   at least one rotating shaft functionally coupled to the rotor of the electrical engine;   at least one compressor block capable of housing, at least partially the rotating shaft;   at least one retaining pin cooperating with the rotating shaft;   the rotating shaft comprises at least one lower region and at least one intermediate region;   said constructive arrangement introduced on reciprocating compressor including helical pump of lubricating oil being specially characterized by:   said lower region comprising the extension of the rotating shaft defined between its own lower end and all its own extension that is disposed outside and below the lower face of the coupling structure of the rotor of the electrical engine;   the cooperating region between the retaining pin and the rotating shaft limits to the lower region; and   said intermediate region comprising the extension of the rotating shaft hollow region disposed from and above the lower side of the coupling structure of the shaft to the rotor, in non-cooperating region with the retaining pin.   
     
     
         2 . Constructive arrangement introduced in reciprocating compressor including helical pump of lubricant oil, according to  claim 1 , characterized by the lower region of the rotating shaft further comprising, on its external side, a contouring recess.